It turns out that by fiddling with these tendencies, avirtual shoal can be made to swirl spontaneously in a circle, just like some real species do.
基于这些倾向就归纳出模型，这些模拟的鱼群可以自行转圈巡游，就像真的一样。
Because it is practice. It is learning in avirtual world the types of skills and behaviors we need to solve theseemingly intractable problems of the real world.
因为游戏是一种练习，我们在虚拟世界里学习的各种技能和行为，我们需要它们来解决现实世界里那些看上去有点棘手的问题。
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